Inbox is where a typical user receives most notifications in Mathoverflow. One also receives moderators' private messages through mail. My question is:
What other notification mechanisms are available in Mathoverflow? For example is it possible to track the questions, comments and answers of a particular user who posts interesting topics in your favorite field? Is there something like a "follow" button for users which exists in most Q&A sites? Is it possible to receive the new questions and answers of a particular user via mail? (It is currently available to receive activities on a particular post via mail).